中国组织工程研究 ›› 2025, Vol. 29 ›› Issue (11): 2294-2300.doi: 10.12307/2025.343

• 组织构建实验造模 experimental modeling in tissue construction • 上一篇    下一篇

耐力训练大鼠抗动脉粥样硬化线粒体自噬通路中抗增殖蛋白2的作用

宋明箫1,陈君顺子1,2,王宁伟1,蔡  欢1,冯  红1   

  1. 1天津体育学院运动健康学院,天津市  301617;2贵阳学院体育学院,贵州省贵阳市  550005

  • 收稿日期:2024-03-05 接受日期:2024-04-28 出版日期:2025-04-18 发布日期:2024-08-10
  • 通讯作者: 冯红,博士,教授,天津体育学院运动健康学院,天津市 301617
  • 作者简介:宋明箫,女,1997年生,山西省运城市人,汉族,2022年天津体育学院毕业,硕士,主要从事运动生理学方面的研究。
  • 基金资助:
    国家自然科学基金面上项目(31470061),项目负责人:冯红

Role of prohibitin 2 in mitophagy pathway against atherosclerosis in rats undergoing endurance training

Song Mingxiao1, Chen Junshunzi1,2, Wang Ningwei1, Cai Huan1, Feng Hong1   

  1. 1School of Sports and Health, Tianjin University of Sport, Tianjin 301617, China; 2School of Physical Education, Guiyang University, Guiyang 550005, Guizhou Province, China
  • Received:2024-03-05 Accepted:2024-04-28 Online:2025-04-18 Published:2024-08-10
  • Contact: Feng Hong, PhD, Professor, School of Sports and Health, Tianjin University of Sport, Tianjin 301617, China
  • About author:Song Mingxiao, Master, School of Sports and Health, Tianjin University of Sport, Tianjin 301617, China
  • Supported by:
    National Natural Science Foundation of China (General Program), No. 31470061 (to FH)

摘要:

文题释义:
抗增殖蛋白2(Prohibitin2,PHB2):是序列高度保守的抗增殖蛋白家族中的一员,在哺乳动物中与PHB1以二聚体的形式定位于线粒体内膜。在线粒体自噬中抗增殖蛋白2可通过独立或依赖于PINK1-Parkin通路与自噬接头蛋白结合,调控线粒体自噬的发生。
动脉粥样硬化:是一种大动脉疾病,目前发病原因尚未完全清楚,主要表现为动脉壁的增厚、变硬并失去弹性,病理特征为动脉内纤维和脂肪的沉积及斑块的形成,血脂异常是最主要的危险因素。

背景:运动可降低血脂,减缓动脉粥样硬化发展。动脉粥样硬化起始于线粒体功能障碍,而抗增殖蛋白2蛋白受耐力训练调控,参与线粒体自噬。
目的:验证耐力训练干预动脉粥样硬化中抗增殖蛋白2蛋白在线粒体自噬通路中的作用。
方法:将40只Wistar大鼠随机分为对照组、运动组、动脉粥样硬化组和动脉粥样硬化运动组,每组10只,后2组大鼠高脂饮食(9周)联合维生素D注射(第1,3,6 周)构建大鼠动脉粥样硬化模型,同时2个运动组大鼠进行跑台递增训练干预9周。干预结束后进行血脂和病理检测观察造模及干预效果;酶标法和Western blot检测线粒体膜电位和自噬相关蛋白表达;免疫荧光观察主动脉中线粒体自噬蛋白的共定位情况。
结果与结论:①血脂和病理切片显示,与动脉粥样硬化组相比,动脉粥样硬化运动组大鼠血清低密度脂蛋白胆固醇、总胆固醇水平和主动脉脂质沉积面积显著降低(P < 0.001)。②线粒体膜电位显示,动脉粥样硬化运动组大鼠主动脉线粒体膜电位的显著降低得到逆转(P < 0.01)。③Western blot显示,与对照组相比,动脉粥样硬化组大鼠线粒体抗增殖蛋白2、LC3Ⅱ/Ⅰ、PINK1和Parkin蛋白表达显著升高(P < 0.05),PARL和PGAM5蛋白表达降低(P < 0.05);与动脉粥样硬化组相比,动脉粥样硬化运动组大鼠线粒体PINK1和Parkin蛋白表达显著降低(P < 0.05),抗增殖蛋白2、LC3Ⅱ/Ⅰ、PARL和PGAM5蛋白表达显著升高(P < 0.05)。④免疫荧光结果显示,动脉粥样硬化组较对照组LC3和PINK1与TOMM20共定位显著增加(P < 0.05),动脉粥样硬化运动组较动脉粥样硬化组LC3与TOMM20共定位显著增加(P < 0.05);动脉粥样硬化组较对照组LC3和PARL与抗增殖蛋白2共定位显著增加(P < 0.01),动脉粥样硬化运动组较动脉粥样硬化组LC3与抗增殖蛋白2共定位显著增加(P < 0.01),PARL蛋白与抗增殖蛋白2共定位显著降低(P < 0.01)。⑤结果表明,耐力训练可诱导线粒体内膜自噬受体抗增殖蛋白2表达,促进抗增殖蛋白2与线粒体自噬接头蛋白的结合完成线粒体自噬,恢复线粒体功能,减缓动脉粥样硬化发生。
https://orcid.org/0009-0001-1392-4742(宋明箫)

中国组织工程研究杂志出版内容重点:组织构建;骨细胞;软骨细胞;细胞培养;成纤维细胞;血管内皮细胞;骨质疏松;组织工程

关键词: 抗增殖蛋白2, 耐力训练, 线粒体自噬, 动脉粥样硬化, 线粒体

Abstract: BACKGROUND: Exercises can reduce blood lipids and slow down the development of atherosclerosis. Atherosclerosis begins with mitochondrial dysfunction, and prohibitin 2 is involved in mitophagy by endurance training. 
OBJECTIVE: To explore the role of endurance training in the intervention of prohibitin 2 protein in the mitophagy autophagy pathway in atherosclerosis. 
METHODS: A total of 40 Wistar rats were randomly divided into control group, exercise group, atherosclerosis group and atherosclerosis combined with exercise group, with 10 rats in each group. A rat model of atherosclerosis was constructed by combining a high-fat diet (9 weeks) with vitamin D injections (weeks 1, 3, and 6) in the latter two groups, while the two exercise groups were subjected to progressing intensity endurance training for 9 weeks. After the intervention, lipid and pathological detections were conducted to observe the modeling and interventional effects. Mitochondrial membrane potential and mitophagy proteins were detected by microplate reader and western blot. Immunofluorescence staining was used to observe the co-localization of mitophagy proteins in aortic tissue. 
RESULTS AND CONCLUSION: Lipid and pathological sections showed that compared with the atherosclerosis group, the serum low-density lipoprotein cholesterol and total cholesterol levels and aortic lipid deposition area were significantly reduced in the atherosclerosis combined with exercise group (P < 0.001). The results of mitochondrial membrane potential showed that the significant decrease in mitochondrial membrane potential of the aorta in the atherosclerosis combined with exercise group was reversed (P < 0.01). The results of western blot assay showed that compared with the control group, the mitochondrial protein expression of prohibitin 2, LC3II/I, PINK1 and Parkin was significantly increased (P < 0.05), and the protein expression of PARL and PGAM5 decreased (P < 0.05). Compared with the atherosclerosis group, the protein expression of PINK1 and Parkin in the mitchondria of rats in the atherosclerosis combined with exercise group was significantly decreased (P < 0.05), and the protein expressions of prohibitin 2, LC3II/I, PARL and PGAM5 were significantly increased (P < 0.05). Immunofluorescence results showed that compared with the control group, the co-localization of LC3 and PINK1 with TOMM20 was significantly increased in the atherosclerosis group (P < 0.05), while compared with the atherosclerosis group, the co-localization of LC3 and PINK1 with TOMM20 was significantly increased in the atherosclerosis combined with exercise group (P < 0.05). Co-localization of LC3 and PARL with prohibitin 2 was significantly increased in the atherosclerosis group compared with the control group (P < 0.01), co-localization of LC3 with prohibitin 2 was significantly increased in the atherosclerosis combined with exercise group compared with the atherosclerosis group (P < 0.01), and co-localization of PARL protein with prohibitin 2 was significantly decreased in the atherosclerosis combined with exercise group compared with the atherosclerosis group (P < 0.01). To conclude, endurance training can induce the expression of prohibitin 2 in the inner mitochondrial membrane and promote the binding of prohibitin 2 to the mitophagy junction protein to complete mitophagy, restore mitochondrial function, and slow down the occurrence of atherosclerosis.


中国组织工程研究杂志出版内容重点:组织构建;骨细胞;软骨细胞;细胞培养;成纤维细胞;血管内皮细胞;骨质疏松;组织工程

Key words: prohibitin 2, endurance training, mitophagy, atherosclerosis, mitochondria

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